Yggdrasil

Developer Tools Python v0.16.0

One shared, durable memory for your AI coding agents — local-first, zero-dependency.

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Install

Pin version registry version 0.16.0

Python
uvx yggdrasil-memory

Python
uvx yggdrasil-memory@0.16.0

Setup by client

Pick your client — the config below is generated for this server (local stdio). Copy respects the “Pin version” switch above.

claude_desktop_config.json

{
  "mcpServers": {
    "yggdrasil": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory"
      ],
      "env": {
        "YGG_ENGINE_TOKEN": "<YOUR_YGG_ENGINE_TOKEN>"
      }
    }
  }
}

{
  "mcpServers": {
    "yggdrasil": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory@0.16.0"
      ],
      "env": {
        "YGG_ENGINE_TOKEN": "<YOUR_YGG_ENGINE_TOKEN>"
      }
    }
  }
}

Format verified against the official Claude Desktop docs ↗.

terminal

claude mcp add --env YGG_ENGINE_TOKEN=<YOUR_YGG_ENGINE_TOKEN> yggdrasil -- uvx yggdrasil-memory

claude mcp add --env YGG_ENGINE_TOKEN=<YOUR_YGG_ENGINE_TOKEN> yggdrasil -- uvx yggdrasil-memory@0.16.0

Format verified against the official Claude Code docs ↗.

.cursor/mcp.json

{
  "mcpServers": {
    "yggdrasil": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory"
      ],
      "env": {
        "YGG_ENGINE_TOKEN": "<YOUR_YGG_ENGINE_TOKEN>"
      }
    }
  }
}

{
  "mcpServers": {
    "yggdrasil": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory@0.16.0"
      ],
      "env": {
        "YGG_ENGINE_TOKEN": "<YOUR_YGG_ENGINE_TOKEN>"
      }
    }
  }
}

Format verified against the official Cursor docs ↗.

.vscode/mcp.json

{
  "servers": {
    "yggdrasil": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory"
      ],
      "env": {
        "YGG_ENGINE_TOKEN": "<YOUR_YGG_ENGINE_TOKEN>"
      }
    }
  }
}

{
  "servers": {
    "yggdrasil": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory@0.16.0"
      ],
      "env": {
        "YGG_ENGINE_TOKEN": "<YOUR_YGG_ENGINE_TOKEN>"
      }
    }
  }
}

Format verified against the official VS Code docs ↗.

mcp_config.json

{
  "mcpServers": {
    "yggdrasil": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory"
      ],
      "env": {
        "YGG_ENGINE_TOKEN": "<YOUR_YGG_ENGINE_TOKEN>"
      }
    }
  }
}

{
  "mcpServers": {
    "yggdrasil": {
      "command": "uvx",
      "args": [
        "yggdrasil-memory@0.16.0"
      ],
      "env": {
        "YGG_ENGINE_TOKEN": "<YOUR_YGG_ENGINE_TOKEN>"
      }
    }
  }
}

Format verified against the official Windsurf docs ↗.

Environment variables

Defined in the server's official registry manifest. Required secrets are shown as <YOUR_…> placeholders in the configs above.

YGG_ENGINE_URL — Base URL of the Yggdrasil engine HTTP API.
YGG_ENGINE_TOKEN secret — Bearer token for authenticating to the Yggdrasil engine (from ~/.yggdrasil/token after `ygg install`).

GitHub

⭐ 22 stars · 最近更新于 55 天前 · AGPL-3.0 license

About this server

🌳 Yggdrasil Stop re explaining your project to every new AI session. / One local memory for Claude Code, Codex, and every MCP agent — shared across sessions, tools, and projects. Zero dependencies. Nothi…

Summary from the project README — github.com/VonderVuflya/yggdrasil

Distributed as Python, listed under Developer Tools. Review our MCP security guide before granting access to real data.

Frequently asked questions

What does the Yggdrasil MCP server do?

How do I install Yggdrasil?

Run the install command shown above, then paste the config for your client (Claude Desktop, Claude Code, Cursor, VS Code or Windsurf) into its MCP settings and restart the client.

Is Yggdrasil free to use?

The MCP server itself is free to install. The source is public on https://github.com/VonderVuflya/yggdrasil. Any third-party service it calls may require its own API key and account.

Which clients support Yggdrasil?

Any MCP-compatible client can use it, including Claude Desktop, Claude Code, Cursor, VS Code, Windsurf and custom agents.

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